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run code in 200+ php & hhvm versions
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<?php $power = [4 => 20, 6 => 0, 18 => 5]; var_dump(array_filter($power)); foreach ($power as $id => $p) { if (0 === $p) { unset($power[$id]); } } var_dump($power);
Output for 5.4.0 - 7.2.0
array(2) { [4]=> int(20) [18]=> int(5) } array(2) { [4]=> int(20) [18]=> int(5) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/nul2U on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/nul2U on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/nul2U on line 3
Process exited with code 255.